Patent US3735278A successfully refreshed from Google Patents.
US3735278A
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US
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Device for wavelength selection in lasers with broad-band emission
Assignee: Carl Zeiss AG
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Filing: 1971-10-12
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Granted: 1973-05-22
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Expires: 1991-10-12
Abstract
Abstract In a device for wavelength selection in dye lasers with a broadband emission, and which comprises in axial alignment a light source, a laser cell, a directional filter including an apertured stop, the improvement comprises a focusing lens system having a wavelength-dependent focal length arranged behind said directional filter and which with the assistance of a mirror images said apertured stop in itself by reflection.
Inventors
- 👤 F Schafer
- 👤 W Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:36
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/08; H01S3/08018; H01S3/0804; H01S3/0805; H01S3/08004; H01S3/14; H01S3/20; H01S3/213
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
151 words
A device for continuous wavelength selection in lasers with broad-band emission, particularly dye lasers comprising a laser cell filled with a laser active medium capable of a broad wavelength range of emission, an optical resonator disposed about said active medium to resonate the radiation from said excited medium and to transmit portions of said resonated radiation, a first optical system in optical alignment with said optical resonator and in the path of radiation emitted from said resonator and forming a directional filter with an apertured stop, and a focusing second optical system with wavelengthdependent focal length arranged in the optical path of rays behind said directional filter and including a mirror for imaging said apertured stop in itself by reflection, said second optical system having great chromatic longitudinal deviation and small spherical abberation and being shiftable along its optical axis to image the apertured stop in itself for a selected wavelength.
Claim 2
Independent Claim
151 words
A device for continuous wavelength selection in lasers with broad-band emission, particularly dye lasers comprising a laser cell filled with a laser active medium capable of a broad wavelength range of emission, an optical resonator disposed about said active medium to resonate the radiation from said excited medium and to transmit portions of said resonated radiation, a first optical system in optical alignment with said optical resonator and in the path of radiation emitted from said resonator and forming a directional filter with an apertured stop, and a focusing second optical system with wavelengthdependent focal length arranged in the optical path of rays behind said directional filter and including a mirror for imaging said apertured stop in itself by reflection, said second optical system having great chromatic longitudinal deviation and small spherical abberation and being shiftable along its optical axis to image the apertured stop in itself for a selected wavelength.
Claim 3
Dependent Claim
14 words
A device according to claim 1, in which said mirror comprises an autocollimating mirror.
Claim 4
Dependent Claim
37 words
A device according to claim 1, in which said focusing element comprises a lens system whose focal length varies for different wavelengths between 50 and 120 mm for wavelengths between lambda 405 nm and lambda 660 nm.
Claim 5
Dependent Claim
25 words
A device according to claim 1, in which said focusing second optical system comprises an interferometrically-holographically made Fresnel zone mirror with a wavelength-dependent focal length.
Claim 6
Dependent Claim
19 words
A device according to claim 1, in which said laser cell and said optical systems have different optical axes.
References Cited (Backward Citations)
US3443243A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |